Add: Enable users to view data present in session manager

Merged Akshay Bharambe requested to merge ab_Add_GetAllCacheItems into devbranch
  1. Add: Enable users to see data present in fastcache
  2. Add: Enable users to see data present in redis
  3. Add: New GetAll() function to cacher interface.
  4. Add: RetrieveAll() function to session manager. Closes MKCLOS/coreosv3/corestudio#546

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